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• How to redirect -progress option output of ffmpeg to stderr ?

  27 janvier 2019, par gerrBen

  I’m writing my own wraping for ffmpeg on Python 3.7.2 now and want to use it’s "-progress" option to read current progress since it’s highly machine-readable. The problem is "-progress" option of ffmpeg accepts as its parameter file names and urls only. But I don’t want to create additional files not to setup the whole web-server for this purpose.

  I’ve google a lot about it, but all the "progress bars for ffmpeg" projects rely on generic stderr output of ffmpeg only. Other answers here on Stackoverflow and on Superuser are being satisfied with just "-v quiet -stats", since "progress" is not very convenient name for parameter to google exactly it’s cases.

  The best solution would be to force ffmpeg write it’s "-progress" output to separate pipe, since there is some useful data in stderr as well regarding file being encoded and I don’t want to throw it away with "-v quiet". Though if there is a way to redirect "-progress" output to stderr, it would be cool as well ! Any pipe would be ok actually, I just can’t figure out how to make ffmpeg write it’s "-progress" not to file in Windows. I tried "ffmpeg -progress stderr ...", but it just create the file with this name.

• Anomalie #3250 (Nouveau) : Les liens dans une autre langue devraient respecter les conventions ty...

  28 juillet 2014, par 毎日 erational -

  Exemple sur un site français / anglais.
  On a un article anglais qui s’appelle "Do you like Mangoes ?" (pas d’espace entre Mangoes et ?, règles typographiques anglaises).
  Si depuis un article français, je fais un lien interne vers cet article, [->75], le titre apparait comme "Do you like Mangoes ?" (avec un espace, règles typographiques françaises alors que l’anglaise devrait s’appliquer)

  Idem si on pinaille, si on fait un lien en précisant la langue
  [Would you to visit Google?|{en}->http://www.google.com] depuis un article français, il serait sans doute pertinent d’appliquer les règles typographiques de la langue cible.

  En attendant on peut toujours tricher en remplaçant les ? par le code HTML &h63; qui évite le traitement typo :p

• Overlaying a large image onto a small video like snapchat

  22 mai 2019, par Tabassum Latif

  I want to add full screen overlay image on different size of video,
  I used ffmpeg it work fine if overlay and video has same scale ratio (same width and height).
  Overlay image squeezed if video height and width size is smaller than overlay image but i want to apply like snap chat video they add black view on top and bottom

  Ffmpeg command is

  String[]{"-y", "-i", filePath, "-i",
  
              overlayPath,
  
              "-preset", "ultrafast",
  
              "-filter_complex",
  
              "[1][0]scale2ref[i][m];[m][i]overlay[v]", "-map",
  
              "[v]", "-map", "0:a?", "-ac", "2", output};

  I want following output link is mention below.

  Snapchat output

  My editing result output